Bitcoin Fog Operator's Conviction Stands Without Source Code Reveal

Bitcoin Fog Ruling Sets Precedent

The Eighth Circuit Court of Appeals on September 25 upheld the 2023 conviction of Roman Sterlingov, who ran the Bitcoin Fog cryptocurrency mixing service. Crucially, the court did so without mandating Chainalysis, the blockchain analytics firm, to reveal the proprietary source code behind its wallet tracing methods.

Reactor Testimony Key to Conviction

The appeals court based its decision on testimony from a confidential informant known as “Reactor,” who collaborated with law enforcement. The court found Reactor’s testimony to be reliably corroborated, establishing a link between Sterlingov and the operation of Bitcoin Fog. The defense had argued that Chainalysis’s tracing capabilities were essential to proving Sterlingov’s guilt and that the source code was needed to verify their accuracy.

Source Code Access Denied

The court rejected this argument, finding that the prosecution had adequately demonstrated the validity of Chainalysis’s methods without needing to expose the underlying code. The ruling emphasized that the defense failed to sufficiently demonstrate why access to the source code was crucial to a fair trial. This decision could set a precedent for future cases involving blockchain analytics and privacy concerns. Bitcoin Fog was used to launder over $335 million in cryptocurrency, including funds linked to darknet markets and ransomware attacks.

Source: CryptoSlate